Chair back



FIG. 1 is a perspective view of a first embodiment of a chair back according to the present invention;

FIG. 2 is an enlarged rear elevational view of FIG. 1 with the lower portion broken away for convenience of illustration;

FIG. 3 is a cross sectional view taken along line 3—3 of FIG. 2;

FIG. 4 is a perspective view of a second embodiment of a chair back according to the present invention;

FIG. 5 is an enlarged rear elevational view of FIG. 4 with the lower portion broken away for convenience of illustration;

FIG. 6 is a cross sectional view taken along line 6—6 of FIG. 5;

FIG. 7 is a perspective view of a third embodiment of a chair back according to the present invention;

FIG. 8 is an enlarged rear elevational view of FIG. 7 with the lower portion broken away for convenience of illustration;

FIG. 9 is a cross sectional view taken along line 9—9 of FIG. 8;

FIG. 10 is a perspective view of a fourth embodiment of a chair back according to the present invention;

FIG. 11 is an enlarged rear elevational view of FIG. 10 with the lower portion broken away for convenience of illustration;

FIG. 12 is a cross sectional view taken along line 12—12 of FIG. 11;

FIG. 13 is a perspective view of a fifth embodiment of a chair back according to the present invention;

FIG. 14 is an enlarged rear elevational view of FIG. 13 with the lower portion broken away for convenience of illustration; and,

FIG. 15 is a cross sectional view taken along line 15—15 of FIG. 14.

The broken lines shown in FIGS. 1, 4, 7, 10 and 13 are for environmental purposes only and form no part of the claimed design. 

The ornamental design for a chair back, as shown and described. 